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b) Based in the stuck pipe case in the last page answer the following questions: i. What do you consider the Stuck Pipe Mechanism is?

b) Based in the stuck pipe case in the last page answer the following questions: i. What do you consider the Stuck Pipe Mechanism is?

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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b) Based in the stuck pipe case in the last page answer the following questions: i. What do you consider the Stuck Pipe Mechanism is? ii. What contributed to these Stuck Pipe Incidents and explain the root cause? iii. Was the correct freeing method applied? iv. What information do you need to be able to advise your preferred action plan? v. Would you attempt to free? (3 marks) Well Data:- Hole Size / Depth AH : 5-7/8" - 3526 m MD Pump Rate 1050 Ipm Mud: KCVPAC, 1.38 kg/l, PV/YP:14/25, WL:3.9 ml Formation : Sand/Siltstone (3021 m), Limestone (3085 m) Claystone (3109 m), Sandstone (3215 m) Csa/Well Trajectory/BHA: 7" casing shoe: 2885 m MD, 39 deg, the steady drop from 39 deg to 8 deg at 3400 m BHA - Drilling: Bit, NBS, ShockSub, SS, MWD, NMSS, NMDC, SS, Circ.Sub, 3DC, SS, 3DC, SS, 3DC, Lo-Torg subs, DC, Jar, DC, HDWP Brief Well History:- Drilled 5-7/8" hole with mudmotor from 2612-3406 m. Took survey (8 deg incl). POH, backreamed all tight spots. RIH with rotary BHA and encountered tight spotat 3039 m. Drill string briefly stuck, but jarred free upwards with one blow. Cont'd RIH without too much resistance (2-3 mton), and cleared 2 m fill on bottom. Drilled ahead from 3406-3526 m. Pumped hi-vis slug around and POH for wipertrip. Good condition hole from 3526-3229 m (11 stands), but25 mton overpull at 3220 m. Made up top drive and established circulation. Made attempts to go down, even jar down, but unsuccessful. Unable to rotate, but circulation okay. Expected differential sticking. Reduced hydrostatic with brine in stages to 1.32 kg/ equivalent mud density, but no success. Circulated out brine. Pumped pipe lax pill, but hole showing packing off tendency. Eventually managed to circulate pipe lax out of hole. Kept working pipe and suddenly pipe got free. Pulled an additional 12 m. Pipe stuck again, packed off, unable to rotate, unable to circulate. Also unsuccessful when 3021m 3085m 3109m 3215m bottom of hole @ 3526m
Transcribed Image Text:b) Based in the stuck pipe case in the last page answer the following questions: i. What do you consider the Stuck Pipe Mechanism is? ii. What contributed to these Stuck Pipe Incidents and explain the root cause? iii. Was the correct freeing method applied? iv. What information do you need to be able to advise your preferred action plan? v. Would you attempt to free? (3 marks) Well Data:- Hole Size / Depth AH : 5-7/8" - 3526 m MD Pump Rate 1050 Ipm Mud: KCVPAC, 1.38 kg/l, PV/YP:14/25, WL:3.9 ml Formation : Sand/Siltstone (3021 m), Limestone (3085 m) Claystone (3109 m), Sandstone (3215 m) Csa/Well Trajectory/BHA: 7" casing shoe: 2885 m MD, 39 deg, the steady drop from 39 deg to 8 deg at 3400 m BHA - Drilling: Bit, NBS, ShockSub, SS, MWD, NMSS, NMDC, SS, Circ.Sub, 3DC, SS, 3DC, SS, 3DC, Lo-Torg subs, DC, Jar, DC, HDWP Brief Well History:- Drilled 5-7/8" hole with mudmotor from 2612-3406 m. Took survey (8 deg incl). POH, backreamed all tight spots. RIH with rotary BHA and encountered tight spotat 3039 m. Drill string briefly stuck, but jarred free upwards with one blow. Cont'd RIH without too much resistance (2-3 mton), and cleared 2 m fill on bottom. Drilled ahead from 3406-3526 m. Pumped hi-vis slug around and POH for wipertrip. Good condition hole from 3526-3229 m (11 stands), but25 mton overpull at 3220 m. Made up top drive and established circulation. Made attempts to go down, even jar down, but unsuccessful. Unable to rotate, but circulation okay. Expected differential sticking. Reduced hydrostatic with brine in stages to 1.32 kg/ equivalent mud density, but no success. Circulated out brine. Pumped pipe lax pill, but hole showing packing off tendency. Eventually managed to circulate pipe lax out of hole. Kept working pipe and suddenly pipe got free. Pulled an additional 12 m. Pipe stuck again, packed off, unable to rotate, unable to circulate. Also unsuccessful when 3021m 3085m 3109m 3215m bottom of hole @ 3526m
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